dicey proposition

I've been praying for patience...which takes the saying "be careful what you wish for" almost literally. In the recent weeks, I've been really testy with people especially on the road. Its something I've struggle with in the past, and its starting to re-surface again. It happened again today...actually, I let it happen again...Its weird because I'm telling myself to relax and to respond with the Spirit but then all of a sudden, it just erupts...I can see it about to happen and yet unable to do anything...idiot gosh!!!
Father, forgive my unyielding spirit. Fill me with your Spirit Lord. Teach me patience and calmness. Guide my thoughts and guard my heart.